# Posts by yusra

Total # Posts: 12

**maths**

The R.F of a map is 1/25000.Find the actual distance,in km,between two villages if the distance apart on the map is....

**math**

the lenght of a rectangle field is twice of its breadth.if the perimeter of field is 27 metre,find its lenght and breadth

**Physics**

Gauaa

**National school**

No thing

**physic**

A 4 kg object is attached to a vertical rod by two strings, as in the figure. The object rotates in a horizontal circle at constant speed 6 m/s. Find the tension in (a) the upper string and (b) the lower string.

**physic**

An object attached to the end of a string swings in a vertical circle (R = 1.2 m), as shown. At an instant when ƒá = 30„a, the speed of the object is 5.1 m/s and the tension in the string has a magnitude of 20 N. What is the mass of the object?

**physic**

A roller-coaster car has a mass of 500 kg when fully loaded with passengers. The car passes over a hill of radius 15 m, as shown. At the top of the hill, the car has a speed of 8 m/s. What is the force of the track on the car at the top of the hill?

**physical**

An airplane travels 80 m/s as it makes a horizontal circular turn which has a 0.8 km radius. What is the magnitude of the resultant force on the 75 kg pilot of this airplane?

**history**

please help me with this question 1. The Warren Commission declared that the Kennedy assassination a. was the act of a single man b. was part of a larger conspiracy c. resulted from poor security d. could have been avoided thanks!

**history**

im still stuck on this quetion...i don't get it?

**history**

i'm stuck on my history homeowork, can someone please help me with some of my questions how did the pattern of European immigration shift in 1890? the answer choices are: a. from Jewish to Catholic Europeans b. from northern to southern and eastern Europeans c. from ...

**Electrochemistry**

14.5

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